Title :
A new capacitive precision liquid-level sensor
Author :
Toth, F.N. ; Meijer, G.C.M. ; vanderLee, M.
Author_Institution :
Fac. of Electr. Eng., Delft Univ. of Technol., Netherlands
Abstract :
The liquid-level sensor consists of a low-cost planar electrode structure, a capacitance-controlled oscillator and a microcontroller. The sensor is able to measure absolute levels of conducting and non-conducting liquids with a 1 mm accuracy over a 4 m range. The system has a high resolution of 0.1 mm at short measuring times of only 0.2 s. Slow level movements of 0.02 mm/h can be detected within 18 min.
Keywords :
capacitance measurement; electric sensing devices; electrodes; leak detection; level measurement; measurement errors; microcontrollers; 18 min; 4 m; absolute levels; accuracy; capacitance-controlled oscillator; capacitive precision liquid-level sensor; conducting liquids; high resolution; low-cost planar electrode structure; microcontroller; nonconducting liquids; short measuring times; slow level movements; Capacitance measurement; Computer errors; Conductivity measurement; Electrodes; Error correction; Fuels; Liquids; Microcontrollers; Parasitic capacitance; Reservoirs;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.547112
